/********************************************************************************* @file stm32f10x_exti.c* @author MCD Application Team* @version V3.1.0* @date 06/19/2009* @brief This file provides all the EXTI firmware functions.******************************************************************************* @copy** THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.** <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>*//* Includes ------------------------------------------------------------------*/#include "stm32f10x_exti.h"/** @addtogroup STM32F10x_StdPeriph_Driver* @{*//** @defgroup EXTI* @brief EXTI driver modules* @{*//** @defgroup EXTI_Private_TypesDefinitions* @{*//*** @}*//** @defgroup EXTI_Private_Defines* @{*/#define EXTI_LineNone ((uint32_t)0x00000) /* No interrupt selected *//*** @}*//** @defgroup EXTI_Private_Macros* @{*//*** @}*//** @defgroup EXTI_Private_Variables* @{*//*** @}*//** @defgroup EXTI_Private_FunctionPrototypes* @{*//*** @}*//** @defgroup EXTI_Private_Functions* @{*//*** @brief Deinitializes the EXTI peripheral registers to their default reset values.* @param None* @retval None*/void EXTI_DeInit(void){EXTI->IMR = 0x00000000;EXTI->EMR = 0x00000000;EXTI->RTSR = 0x00000000;EXTI->FTSR = 0x00000000;EXTI->PR = 0x000FFFFF;}/*** @brief Initializes the EXTI peripheral according to the specified* parameters in the EXTI_InitStruct.* @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure* that contains the configuration information for the EXTI peripheral.* @retval None*/void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct){uint32_t tmp = 0;/* Check the parameters */assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode));assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger));assert_param(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line));assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));tmp = (uint32_t)EXTI_BASE;if (EXTI_InitStruct->EXTI_LineCmd != DISABLE){/* Clear EXTI line configuration */EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line;EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line;tmp += EXTI_InitStruct->EXTI_Mode;*(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;/* Clear Rising Falling edge configuration */EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line;EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line;/* Select the trigger for the selected external interrupts */if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling){/* Rising Falling edge */EXTI->RTSR |= EXTI_InitStruct->EXTI_Line;EXTI->FTSR |= EXTI_InitStruct->EXTI_Line;}else{tmp = (uint32_t)EXTI_BASE;tmp += EXTI_InitStruct->EXTI_Trigger;*(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;}}else{tmp += EXTI_InitStruct->EXTI_Mode;/* Disable the selected external lines */*(__IO uint32_t *) tmp &= ~EXTI_InitStruct->EXTI_Line;}}/*** @brief Fills each EXTI_InitStruct member with its reset value.* @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will* be initialized.* @retval None*/void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct){EXTI_InitStruct->EXTI_Line = EXTI_LineNone;EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt;EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Falling;EXTI_InitStruct->EXTI_LineCmd = DISABLE;}/*** @brief Generates a Software interrupt.* @param EXTI_Line: specifies the EXTI lines to be enabled or disabled.* This parameter can be any combination of EXTI_Linex where x can be (0..19).* @retval None*/void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line){/* Check the parameters */assert_param(IS_EXTI_LINE(EXTI_Line));EXTI->SWIER |= EXTI_Line;}/*** @brief Checks whether the specified EXTI line flag is set or not.* @param EXTI_Line: specifies the EXTI line flag to check.* This parameter can be:* @arg EXTI_Linex: External interrupt line x where x(0..19)* @retval The new state of EXTI_Line (SET or RESET).*/FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line){FlagStatus bitstatus = RESET;/* Check the parameters */assert_param(IS_GET_EXTI_LINE(EXTI_Line));if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET){bitstatus = SET;}else{bitstatus = RESET;}return bitstatus;}/*** @brief Clears the EXTIs line pending flags.* @param EXTI_Line: specifies the EXTI lines flags to clear.* This parameter can be any combination of EXTI_Linex where x can be (0..19).* @retval None*/void EXTI_ClearFlag(uint32_t EXTI_Line){/* Check the parameters */assert_param(IS_EXTI_LINE(EXTI_Line));EXTI->PR = EXTI_Line;}/*** @brief Checks whether the specified EXTI line is asserted or not.* @param EXTI_Line: specifies the EXTI line to check.* This parameter can be:* @arg EXTI_Linex: External interrupt line x where x(0..19)* @retval The new state of EXTI_Line (SET or RESET).*/ITStatus EXTI_GetITStatus(uint32_t EXTI_Line){ITStatus bitstatus = RESET;uint32_t enablestatus = 0;/* Check the parameters */assert_param(IS_GET_EXTI_LINE(EXTI_Line));enablestatus = EXTI->IMR & EXTI_Line;if (((EXTI->PR & EXTI_Line) != (uint32_t)RESET) && (enablestatus != (uint32_t)RESET)){bitstatus = SET;}else{bitstatus = RESET;}return bitstatus;}/*** @brief Clears the EXTIs line pending bits.* @param EXTI_Line: specifies the EXTI lines to clear.* This parameter can be any combination of EXTI_Linex where x can be (0..19).* @retval None*/void EXTI_ClearITPendingBit(uint32_t EXTI_Line){/* Check the parameters */assert_param(IS_EXTI_LINE(EXTI_Line));EXTI->PR = EXTI_Line;}/*** @}*//*** @}*//*** @}*//******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/